You should be very careful with alts. Back in time I had many altcoins and I had no time to monitor each of them. So I lost a good part of my holdings
I also made a mistake like that before, and now that altcoins are gone and have no value at all. We have to take care always because even the strong altcoins can also go down, so watch always. If you have many coins better to reduce it with the most effective coins that you have, more holdings meaning more stress to me.